<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>权限列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-button type="primary"
                 @click="addDialogVisible = true">添加角色</el-button>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList"
                stripe
                border>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']"
                    v-for="(item1,i1) in scope.row.children"
                    :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable
                        @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag><i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 二级权限渲染 -->
                <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']"
                        v-for="(item2,i2) in item1.children"
                        :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success"
                            closable
                            @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag><i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限渲染 -->
                  <el-col :span="18">
                    <el-tag type="warning"
                            closable
                            @close="removeRightById(scope.row,item3.id)"
                            v-for="(item3) in item2.children"
                            :key="item3.id">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"
                         label="#">
        </el-table-column>
        <el-table-column prop="roleName"
                         label="角色名称">
        </el-table-column>
        <el-table-column prop="roleDesc"
                         label="角色描述">
        </el-table-column>
        <el-table-column label="操作"
                         width="300px">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button type="primary"
                       icon="el-icon-edit"
                       size="mini"
                       @click="showEditDialog(scope.row.id)">
              编辑
            </el-button>
            <!-- 删除按钮 -->
            <el-button type="danger"
                       icon="el-icon-delete"
                       size="mini"
                       @click="removeRolesById(scope.row.id)">
              删除
            </el-button>
            <!-- 分配权限按钮 -->
            <el-tooltip effect="dark"
                        content="分配角色"
                        placement="top"
                        :enterable='false'>
              <el-button type="warning"
                         icon="el-icon-setting"
                         size="mini"
                         @click="showSetRightDialog(scope.row)">
                分配权限
              </el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加用户的对话框 -->
    <el-dialog title="添加角色信息"
               :visible.sync="addDialogVisible"
               width="50%"
               @close="addDialogClose">
      <!-- 内容主体区域 -->
      <el-form :model="addForm"
               :rules="addFormRules"
               ref="addFormRef"
               label-width="80px">
        <el-form-item label="角色名称"
                      prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述"
                      prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>

      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改用户的对话框 -->
    <el-dialog title="修改用户信息"
               :visible.sync="editDialogVisible"
               width="50%"
               @close="editDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="editForm"
               ref="editFormRef"
               :rules="editFormRules"
               label-width="100px">
        <el-form-item label="角色 ID">
          <el-input v-model="editForm.roleId"
                    disabled></el-input>
        </el-form-item>
        <el-form-item label="角色名称"
                      prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述"
                      prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="editRolesInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限"
               :visible.sync="setRightsDialogVisible"
               width="50%"
               @close="setRightsDialogClosed">
      <!-- 树型控件 -->
      <!-- 树节点唯一标识node-key string类型 -->
      <el-tree :data="rightsList"
               :props="treeProps"
               show-checkbox
               node-key="id"
               default-expand-all
               :default-checked-keys="defKeys"
               ref="treeRef"></el-tree>
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="setRightsDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 角色列表
      rolesList: [],
      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 添加角色表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 修改用户的表单数据
      editForm: {},
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 控制分配权限对话框的显示与隐藏
      setRightsDialogVisible: false,
      // 获取权限列表
      rightsList: [],
      // 树型控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 即将分配权限角色的id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
      this.rolesList = res.data
    },
    // 监听添加用户对话框的关闭事件 重置数据
    addDialogClose () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮，添加新角色
    addRoles () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败！')
        }
        this.$message.success('添加用户成功！')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getRolesList()
      })
    },
    // 展示编辑用户的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息并提交
    editRolesInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        /*  console.log(res) */
        if (res.meta.status !== 200) {
          this.$message.error('更新用户信息失败！')
        }
        this.$message.success('更新用户信息成功！')
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
      })
    },
    // 删除角色
    removeRolesById (id) {
      this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
        // 确认后的操作
      }).then(async () => {
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('删除用户失败！')
        }
        this.$message.success('删除用户成功！')
        this.getRolesList()
        // 失败后的操作
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        })
      })
    },
    // 根据ID删除对应权限
    removeRightById (role, rightId) {
      this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }
        this.$message.success('删除权限成功！')
        // 返回的data, 是当前角色下最新的权限数据
        role.children = res.data
        // 失败后的操作
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        })
      })
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) { return this.$message.error('获取权限列表失败！') }
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      this.setRightsDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      // 不是三级节点调用递归函数
      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件 重置数据
    setRightsDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      // 合并半选和选中的节点权限id
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // 以 `,` 分割的权限 ID 列表（获取所有被选中、叶子节点的key和半选中节点的key, 包括 1，2，3级节点）
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightsDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-top: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
